package com.qiange.filter;

import com.alibaba.fastjson.JSON;
import com.qiange.common.BaseContext;
import com.qiange.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Autowired
    private RedisTemplate redisTemplate;
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();

        log.info("拦截到请求：{}",requestURI);

        String[] urls = {
            "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/login",
                "/user/sendMsg"

        } ;
        boolean check = urlCheck(urls, requestURI);
        if (check){
            log.info("本次请求{}不需要处理",requestURI);

            filterChain.doFilter(request,response);
            return;
        }

        //管理后台判断用户是否登录
        if (request.getSession().getAttribute("employeeid") != null){

            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("employeeid"));

            Long id = (Long) request.getSession().getAttribute("employeeid");




            BaseContext.setId(id);
            filterChain.doFilter(request,response);

            return;
        }

        //移动端   判断用户是否登录
/*        if (request.getSession().getAttribute("user") != null){

            log.info("用户已登录，用户id为：{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");

            BaseContext.setId(userId);
            filterChain.doFilter(request,response);
            return;
        }*/
        //利用redis缓存判断移动端用户是否登录
        if (redisTemplate.opsForValue().get("user") != null){
            log.info("用户已登录，用户id为：{}",redisTemplate.opsForValue().get("user"));

            Long userId = (Long) redisTemplate.opsForValue().get("user");

            BaseContext.setId(userId);

            filterChain.doFilter(request,response);
            return;

        }


        response.getWriter().write(JSON.toJSONString(Result.error("NOTLOGIN")));
        return;
    }

    public boolean urlCheck(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }
}
